根据短文的内容，回答下列题目<br>Sleepless at Night<br>It was a normal summer night. Humidity (湿气) hung in the thick air. I couldn&39;t go to sleep,partly because of my cold and partly because of my expectations for the next day. My mum had said that tomorrow was going to be a surprise.<br>Sweat stuck to my aching body. Finally, I gathered enough strength to sit up. I looked out of my small window into the night. There was a big bright moon hanging in the sky, giving off a magic light.<br>I couldn&39;t stand the pressure anymore, so I did what I always do to make myself feel better. I went to the bathroom and picked up my toothbrush and toothpaste. I cleaned my teeth as if there was no tomorrow. Back and forth, up and down.<br>Then I walked downstairs to look for some signs of movement, some life. Gladiator, my cat frightened me as he meowed (喵喵地唱出 ) his sad song. He was on the old orange couch (长沙发), sitting up on his front legs, waiting for something to happen. He looked at me as if to show"I&39;m lonely, pet me. I need a good hug (紧抱 ) .”Even the couch begged me to sit on it.<br>In one movement I settled down onto the soft couch. This couch represented my parents&39; marriage, my birth, and hundreds of other little events.<br>As I held Gladiator, my heart started beating heavily. My mind was flooded with questions:What&39;s life？ Am I really alive？ Are you listening to me？ Every time I moved my hand down Gladiator&39;s body, I had a new thought; each touch sang a different song.<br>I forgot all about the heat and the next day&39;s surprise. The atmosphere was so full of warmth and silence that I sank into its arms. Falling asleep with the big cat in my arms, I felt all my worries slowly move away.<br>The author of the passage could not go to sleep partly because__________. 查看材料
A. it was too cold
B. it was too dry
C. he had a cold
D. he had a fever
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